East Swindon, South Marson/Stratton/Dorcan river
Haydon Wick/Penhill/Peatmoore/Shaw/Old Town/Coat/Wroughton
The water flooding isnt the biggest problem, the biggest concern is the damage caused by pollution within the water.
Thames water is responsible for Swindon's sewers. Council is responsible for the public water drainage, eg. Highway gullies, Paths & Ditches
Swindon is 500m above sea level, so the only localised flooding near rivers should occur.
In the event of severe flooding, Gloucester, Central London, Weston and South of Bristol will be flooded first!